This precision speed control was obtained in an Electronic Design from the 90's. The output final stage power transistors must be in accordance with the motor power.
This 4.5 MHz amplifier is suitable for analog TV applications. We found it in a 1967 Philips...
This circuit is one of many that can be found in this section using the 555. This circuit was...
We found this circuit in the 1994 National Semiconductor Linear Applications Handbook. The circuit is...